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        {
            "id": 11804,
            "url": "https://svs.gsfc.nasa.gov/11804/",
            "result_type": "Produced Video",
            "release_date": "2015-05-14T14:00:00-04:00",
            "title": "RXTE Data Link Pulsar Pulses with a QPO",
            "description": "This animation illustrates the direct relationship between a pulsar's X-ray pulses and its quasi-periodic oscillation (QPO), a flickering signal that hovers around certain frequencies. The QPO is shown here as a bright patch near the inner edge of the disk of gas that feeds matter to the pulsar at the center, called SAX J1808. Guided by magnetic fields, gas streaming onto the neutron star forms bright hot spots. As the pulsar spins 401 times a second, telescopes detect X-ray pulses as these locations swing into view from Earth. When the QPO orbits more slowly than the pulsar’s spin, the neutron star’s magnetic field holds back flowing gas, dimming the X-ray pulses. But during an outburst, the inner edge of the disk is forced closer to the pulsar, resulting in a faster-moving QPO and compression of the pulsar's magnetic field. When the QPO matches or bests the pulsar’s spin, more gas streams onto the neutron star, and the pulses brighten. Gas may even flow directly onto the pulsar's equatorial region, producing extra hot spots. NASA’s Rossi X-ray Timing Explorer observed this relationship during outbursts in 2002, 2005, and 2008. Credit: NASA's Goddard Space Flight Center Conceptual Image Lab || QPO_16bit_00728_print.jpg (1024x576) [96.1 KB] || QPO_16bit_00728_web.jpg (320x180) [16.6 KB] || QPO_16bit_00728_thm.png (80x40) [7.1 KB] || 1920x1080_16x9_30p (1920x1080) [0 Item(s)] || 11804_RXTE_QPO_H264_Good_1920x1080_2997.mov (1920x1080) [45.4 MB] || 11804_RXTE_QPO_MPEG4_1920X1080_2997.mp4 (1920x1080) [28.0 MB] || QPO_16bit_00728.tif (1920x1080) [11.9 MB] || 11804_RXTE_QPO_H264_Good_1920x1080_2997.webm (1920x1080) [3.9 MB] || 11804_RXTE_QPO_H264_Best_1920x1080_2997.mov (1920x1080) [240.9 MB] || 11804_RXTE_QPO_ProRes_1920x1080_2997.mov (1920x1080) [416.6 MB] || ",
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